Duplex burner and combustion chamber therefor



D@ 31, 1940- B. HAYrI-:R ErAL 2,227,036

DUPLEX BURNER AND`QOMBUSTION CHAMBER THEREFOR Filed Sepl.. 14. 1939- 2 Sheets-Sheet 1 Dec. 31, 1940. B. HAYTER ETAL DUPLEX BURNER AND COMBUSTION-'CHAMBER THEREFOR Fi1ed`Sept. 14, y1939 2 Sheets-Sheet 2 ATTORNEYS.

Q between the side walls t, 5.

Patented Dec. 31,1940 f UNITED A STATES PATENT "ol-FICE DUPLEX-BURNER AND COMBUSTIGN CHAMBER THEREFOR.

Bruce Hayter and Milton D. Huston, Santa Fe,

ex., assignors to Oil Devices, Santa Fe,

Our invention relates to an improvement in burners or heaters of the pot type, and has for one purpose the provision of an improved multiple pot heater for liquid hydrocarbon fuels.

Another purpose is the provision of an im proved unit for a heater in which a plurality of pot type burners may be employed in connection with a unitary cabinet structure.

Another purpose is the provision of improved means for circulating the products of combustion from a plurality of pot type burners and for thereby heating air to be circulated through the space to be heated. Y

Other purposes will appear from time to time in the course of the specification and claims.

We illustrate our invention more or less diagrammatically in the accompanying 4drawings wherein:

Fig. 1 is a side elevation of parts in vertical section;

Fig. 2 is a plan View with parts broken away; and

Fig. 3 is a section on the line 3 3 of Fig. l.

Like parts are indicated by like symbols throughout the specification and drawings.

Referring to the drawings, i generally indicates an outer housing having end walls 2, t and side walls il, 5. The side walls may be cut away as at 6 in order to provide for the entry of air, and if desired air inlets 'i may be provided in the rend walls 2, 3. 8 indicates any suitable transversely extending base supports, and 9 intermediate transversely extending heater supports, which may be of angle iron or the like and are shown as arranged in twoi pairs and as extending il) is any suitable top, which may be provided with outletl apertures il for the delivery of heatedair to the space to be heated.

Mounted on the members 9 is the heater or of generally cylindrical shells i2, i3, having bottoms Id, apertured as at i5. Located within each such shell is a pot it, having a bottom il and a side wall i8, provided with a plurality of primary air apertures i9 and secondary air apertures 28.

2i, 22 are any suitable fuel inlet lines, which may be controlled by valve or in any manner not herein shown and not of themselves forming part of the present invention.

It will be understood that air admitted through the apertures 5. or 'i in the outer housing may penetrate through the apertures i5 of the bottom members l2 and i3 and may thereby penetrate to the space between the members i2 and i3 and the pots I6. The upper portion of such space is closed by any suitable flange or flanges 23.' The top aperture o f the pot may further be partially closed or restricted as by baffles 24, with central apertures 25.

26 is any suitable motor mounted, for example', on a bracket 2l, which may be secured to the member l2, which operates a fan 2B, which may be energized from any suitable source of electric power through the conductive lines 29 and 30. It willV be understood that our device may be operated at natural circulation, but under some circumstances a fan or other means for forcing the circulation of air may be advantageous.

1t will be observed `that we provide two separate pots or burners within a single heating structure.' In order to maintain an advantageous heat exchange and in order to simplify the ue structure, we may provide a single unitary nue 3 I.

Positioned above each of the pots iii we provide a. generally cylindrical combustion or radiation chamber 32, 33, suclr chambers being connected by tangential passage structures 3i, formed by tangential side walls 35, 36, and inner side walls 3l, tti. We also provide a cross passage 5d defined by the walls 3Q, lill, generally aligned with the ue 3i. @il is any suitable ue connection `extending from the side wall 36 to the flue 3i heated by the products oi combustion.

ftd, te are any suitable lids or closures, which may be hinged as at it on the upper wall il of the above described structure, and which are adapted to close apertures iid. da are any suitable upwardly inclined baflies located in the passage adjacent the side wall 36.

It will be realized that whereas we have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and Vdisposition of parts without ,departing` from the spirit of our invention. We therefore wish our description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting us to our precise showing.

The use and operation of'our invention are as follows: y

The drums 32, 33 received the heated products of combustion from the'pots i6, and also are heated by radiation from the ame. 'I'he hot gases as they leave the combustion chambers pass through the front and rear iiue passages 3d,

proportion of the gases flows through the front flue passages 34 and the connecting cross passage 50, which opens directly to the smokepipe or iiue connection 3l, 4i. The bailies :49 prevent the ue gas from short circuiting directly from the drums 32, 33 to the smoke pipe.

The height of the two drums is such that access to the burners or pots can' easily be obtained through the top. No side doors need b-e .employed, and the top doors 44, 45, or hinged lids, or even an ordinary cast iron stove lid, may be employed to give access to the interior.

Under ordinary circumstances a fan need not be used, but if air forcing means are advantageous, the employment of the fan is practical, and the device is designed for efficient use of the fan.

Under test the draft gain is substantially the same as in the ordinary single drum heaters, and the true efficiencies are extremely high. There is an absence oftortuous passages, and no draft loss problemto contend with.

We claim:

1. In a heating unit, a pair of adjacently located burners and means for delivering fuel and air thereto, a generally cylindrical combustion chamber located above and in communication with each said burner, a plurality of transversely extending flue passages tangentially connecting said combustion chambers, said passages extending substantially from top to bottom of the combustion chambers, and dening an upwardly extending air. passage, a cross flue passage connecting said transversely extending tangential passages, and stack means in communication with said nue passages.

2. `In a heating unit, a pairof adjacently located burners and means for delivering fuel and air thereto, a generally cylindrical combustion chamber located above and i communication with each said burner, a plurality of transversely extending nue passages tangentially connecting said comstack means' in communication with said flue pasmeans in said tangential passage-adjacent said stack means, adapted to restrict the kflow of hot gases therethrough toward the stack means.

4. In a heating unit, a pair of adj acently located burner pots and means for delivering liquid fuel and air thereto, combustion chambers located above and in communication with each said pot, a plurality of transversely extending flue passages connecting said combustion chambers, said passages extending substantially from top to bottom of the combustion chambers, a cross iiue passage connecting said transversely extending passages, stack means in communication with one of said transversely extending passages, in alignment with said cross flue passage, and baiile means in said transversely extending passage, adjacent said stack means, adapted to restrict the iow of hot gases therethrough toward the stacl: means.

5. In a heating unit, a pair of adjacently located vburner pots and means for delivering liquid fuel and air thereto, combustion chambers located above and in communication with each said pot, a plurality of transversely extending ue passages connecting said combustion chambers, said passages extendingsubstantially from top to bottom of the combustion chambers, a cross iiue passage connecting said transversely extending passages,

above and in communication with each said pot,

a plurality of transversely extending flue passages connecting said combustion chambers, a cross flue passage connecting said transversely extending passages, stack means in communication with one of said transversely extending passages, in alignment with said cross flue passage, and baille means in said transversely extending passage, adjacent said stack means, adapted to restrict the ow of hot gases therethrough toward the stackmeans.

'7. In a heating unit, a burner pot having a Wall with a plurality of primary air inlets therein, and a bottom, means for delivering liquid fuel to the pot bottom, a combustion chamber located above and generally coaxial with the burner pot, a flue laterally spaced from said upper chamber, and a ue outlet therefor, said ue and said upper chamber being of generally the same height and having a plurality of connections therebetween extending substantially from top to bottom thereof, said nue outlet being adjacent one of said connections, and a baille means in the passage vclosest said flue outthrough toward said flue outlet. i

8. In a heating unit, a burner pot having a wall with a plurality of primary air inlets therein, and

a bottom, means for delivering liquid fuel to the pot bottom, a combustion chamber located above and generally coaxial with the burner pot, a flue laterally spaced from said upper chamber, and a iiue outlet therefor, said ue and said upper chamber being of generally the same height and having a plurality of generally tangential connections therebetween extending substantially from top to Vbottom thereof, said flue outlet being adjacent one of said connections, and a baie means in the passage closest said ue outlet, adapted to restrict the iiow of hot gases therethrough toward said ue outlet.

BRUCE HAYTER.

MJLTON D. HUSTON.

. let, adapted to restrict the ilow of hot gases there- 

